FeaturesCan record up to 10 different fingerprintsUnlocks in 0.5 secondsZinc alloy metal body constructionUp to 3 months standby timeSuitable for both indoor and outdoor useNo app, no Bluetooth, no key - your finger is the key with the ENER-J Fingerprint Padlock. Suitable for all ages, it can record up to 10 different fingerprints so you can share it with your family members. And it only takes 0.5 second to unlock it.The zinc alloy metal body construction means it is small and light but sturdy to prevent it from being pried, smashed or cut. It is suitable for both indoor and outdoor use.The rechargeable 180MAH li-ion battery can support three months standby time. Simply connect the lock to a power supply and it will resume working.